Throttle-valve.



No. 798,292. PATENTED AUG. 29, 1905,

R. A. NORLING.

' THROTTLE VALVE.

APPLICATION FILED FEB. 18,1906.

UNITED STATES IiATENT FFICE.

REINHOLD A. NORLING, OF AURORA, ILLINOIS, ASSIGNOR TO AURORA AUTOMATIC MACHINERY COMPANY, OF AURORA, ILLINOIS, A COR- PORATION OF ILLINOIS.

THROTTLE-VALVE.

Specification of Letters Patent.

Patented Aug. 29, 1905.

Application filed February 18, 1905. Serial No. 246,309.

To all whom it may concern.-

Be it known that I, REINHoLi) A. NORLING, a citizen of the United States, and a resident of Aurora, in the county of Kane and State of Illinois, have invented certain new and useful Improvements in Throttle-Valves; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

A throttle-valve embodying my invention is shown in the accompanying drawings in connection with a portable pneumatic hammer of that kind embracing a barrel or cylinder, a piston therein, and a controlling-valve through which the air is admitted to and per mitted to escape from the opposite ends of the cylinder to give reciprocatory movement to the plunger. Such a throttle-valve, however, may be applied to pneumatic motors or tools of other kinds.

The invention consists in the matters hereinafter set forth, and pointed outin the appended claims.

As shown in the accompanying drawings, Figure 1 is a view in side elevation ofa pneumatic hammer of the kind hereinbefore referred to, showing the throttle-valve in central longitudinal section. Fig. 2 is a central longitudinal section of the parts shown in Fig. 1, taken on a plane indicated by line 2 2 of said Fig. 1. Fig. 3 is a detail view, partially in side elevation and partially in section, of the head or cap of the tool, the section being taken on the plane indicated by the line 3 3 of Fig. 1.

As shown in said drawings, A indicates the working cylinder or barrel of the tool, B the hollow cylindric head attached. to the inner end of the barrel, and C a handle which is shown as madeintegral with the said head B.

Within the head B, in a part thereof which forms the end wall of the head and at the base of the handle O, is formed a transverse bore or passage Z), in which is located the throttlevalve and one end of which communicates with a transverse inlet-passage 6, formed in the head at one end of the handle C and the outer end of which is screw-threaded or otherwise constructed for connection with an airsupply pipe through which air or other gasend of said bore or passage.

eous fluid under pressure is supplied to the tool. Said bore or passage 6 communicates, by means of a centrally-arranged port or opening 6 in the end wall of the head B, with a space or chamber B, from which the air passes to the controlling-valve of the device.

The bore or passage formed in the head B, as hereinbefore described, opens at its ends through opposite sides of the head, and within the same is located a cylindric bushing D, which is fixed immovably in the head and extends from the side thereof at which the inletpassage 6 is located nearly to the opposite Within the bushing D is located a rotative valve-tube E. The bushing D is provided with an aperture cl, coinciding with the opening 6 while the valve-tube E is provided with an opening 6, adapted to register with the said opening d. The bushing D is also provided with an aperture cl, coinciding with the inlet-passage 6, while the valve-tube E is provided with a port a to register with the port cl, but which when the valve is turned will be carried out of register with said port, so as to partially or entirely cutoff the passage of air from the supply-passage b to the interior of said valvetube. Preferably the port 6 is made wide enough to afford constant communication of the interior of the tube E within the space B in the head B, so that when the said tube E is turned into the position to bring the port (2 out of register with the port CZ the air-supply will be cut ofl at a point adjacent to the inletpassage 6, and no pressure will exist in the interior of the tube E. Leakage of air from said tube when the throttle-valve is closed is thus prevented.

At its end remote from the supply-passage b the valve-tube E is attached to a rotative plug F, which closes the end of the tube and through the medium of which the same is turned or oscillated. Said. plug F fits and turns within the adjacent end of the bore d of the head B, and a spring G is applied to act on said plugF in such manner as to turn the valvetube in a direction to close the valve. Said spring G is shown in the drawings as having the form of a coiled spring which surrounds a reduced part of the plug F and is engaged at one end with a shoulder on the head B and at its opposite end with the plug. Secured in the said plug F is a radial arm f, adapted to move in a transverse slot 0, Figs. 1 and 3, formed in the end portions of the handle C.

An actuating-lever H is mounted on the head B at one side of the handle 0 in. proper position for contact therewith of the thumb of the operator when theqhand grasps said handle.

An endwise-sliding actuating-rod Iis mounted in a guide-passage 6 formed in the head B near the base of the handle O, in such position that one end thereof will rest or bear against the laterally-extending arm [L of the actuatinglever H, Fig. 1. The opposite end of said rod rests or bears against the stud f.

'From the construction described it will be manifest that when the actuating-lever H is presseddownwardly or inwardly the sliding actuating-pin I will act on the stud f to turn the plug F against the action of'the spring Gr, thereby rotating the valve-tubein a direction to open the valve. Upon releasing the lever the spring turns the tube in a direction to close the valve.

In connection'with a rotative'throttle-valve made-as above described I provide means for varying the quantity of air delivered to the machine when the throttle-valve is opened, the samebeing constructed as follows: Within the outer end of the valve-tube E, or that adjacent to the supply-passage 5, is located an end wise-slid ing valve-plug J, which fits closely within said tube and the inner end of which is adapted tooverlap to a greater or less extent the port a of the valve-tube E when the said plug is moved inwardly. Said plug is held from turning or rotating in said tube E by means of a guide-pin affixed to the plug and sliding in a longitudinal slot 0 formed in the tube E; For giving endwise movement to the plug a screw-shaft K is provided. The adjacent'end of the valve-tube is provided with a centrally apertured end wall, and the said screw-shaft K has screw-threaded engagement with the plug and passes through the said aperture in the end wall of the valve-tube. The bushing 1) is also provided, with a centrallyaper'tured end wall through which the shaft also passes. Said screw-shaft is provided outside of the bushing with a milled disk or head K. Said screw-shaft K is held from outward endwise movement with respect to the valvetube and bushing by a suitable bearing-shoulder engaging the inner face of the end wall of the valve-tube, said shoulder being conveniently formed by a flange it on the shaft. I nward movement of the screw-shaft in the val vetube and bushing is prevented by contact of the head K with the outer end of the bushing. To provide for a tight joint between the outer end of the valve-tube and the closed end of the bushing, a packing-ring L is inserted between the head of the bushing and the adjacent end of the sleeve, said packing being also adapted to bear against the cylindric surface of the screw-shaft K.

From the above description it will be manifest that when the adjusting-screwK is turned to carry the plug inwardly the latter will partially overlap and close the port 6' and that by turning the adjusting-screw to move the plug inwardly or outwardly the supply of air to the machine may be regulated or controlled separately from its control by the turning of the valve-tube through the actuating-lever.

1 claim as my invention 1. A throttle-valve comprising a cylindric valve-chamber provided with lateral air sup ply and outlet passages and a rotative valvetube in said chamber which is closed at both ends and provided between its ends with lat eral inlet and outlet ports..

2. 'A throttle-valve comprising a cylindric valve-chamber provided with lateral ainsupply and outlet passages, and .a rotativevalveitube in said chamber closed at botli' en'ds and provided with lateral inlet and outletports, a spring applied to turn the said tube in one direction and an actuatingleveradapted to act upon the tube to turn the same in the opposite direction against the action ofsaid spring.

3. A throttle valve comprising a valvechamber having lateral air supply and outlet passages, a rotativ e valve-tubein' saidcliam. b er closed at both ends and provided between its ends with lateral ports adapted to-register with the said air supplyand outlet passages, a plug secured to one end of said tube, .a spring appliedto the said'vplug t tum the tube in one direction, said plug being ro,-

vided with a radial arm, afpivoted actuating;- lever, and an operating COIIHQGLIOH between said actuating-lever and saidlarmon theplug.

4. The combination with a barrel provided,

with a handle and with a cylindric bore'ex tending through the same at the base of the handle and forming a valve-chamber andghav ing an airsupplypassage leading laterally into said valve-chamber and adoutlt-passage leading laterally therefroriimf' a rotative valve-tube locatedjin said valve-chamber, said tube being closed at both ends and provided with a lateral inlet-port adapted to register with the air-supply passage, a plug mounted in one end of the bore and attached to said tube; said plug'being provided with'fa radial arm, a coiled spring acting to turn the plug and tube in one direction, an actuatingflever pivotally mounted on the handle,,;an d aslid: ing rod transmitting movement from said ac: tuating-lever to said arm. v

5. 'A throttlevalve comprising a cylindric valve-chamber provided with a lateral airsupply passage, a rotative valve-tube located therein and I provided with a lateral p ort adapted to register with said air-supply passage, and adjustable means for varying the size of the said port in thevalve-tube.

6. A throttle-valve comprising acyli'ndric' valve-chamber provided with a lateral air:

supply passage, a rotative valve-tubeinsaid valveazhamber provided with a lateral port adapted to register with the said air-supply passage, and an endwise-sliding plug in said tube adapted to control the size of the said inlet-port.

7. A throttle-valve comprising a cylindric valve-chamber provided with a lateral airsupply passage, a rotative valve-tube in said valve-chamber provided with a lateral port adapted to register with the said air-supply passage, an end wise-sliding plug in said tube, the endwise movement of which controls the size of the said inlet-port, and a screw-shaft extending outwardly through the end of the valve-chamber and engaged with said plug 5 for giving endwise movement to the latter.

In testimony that I claim the foregoing as my invention I aflix my signature, in presence of two witnesses, this 16th day of February, A. D. 1905.

REINHOLD A. NORLING. Witnesses:

G. E. ERIKsoN, F. A. BURGESS. 

